As a new generation of high-thrust turbofan engine used by the heavy four, it must have exhausted all the relevant key technologies that the Republic can now master, so the development of the core engine is an extremely risky move. Pen, fun, and www.biquge.info

Although the entire United Aero Engine Company has carried out the pre-research of related technologies several years ago, until this time, the development of the fourth-generation turbofan is still not fast.

"This is the current fourth-generation big push core machine, and it is also the first ignition test conducted only a few months ago, and it is generally relatively successful, although some small problems have been exposed one after another, but they are all acceptable."

This seems to be a weightlift, and it seems that all the encounters are trivial, but Yang Hui knows that there will definitely be all kinds of problems encountered in the research and development of this core machine, and as far as this complex and precise mechanical engineering design is concerned, it is really bad if there are no problems.

The only good news is that as far as the current situation is concerned, it seems that there are no major problems in the development of the core machine that cannot be solved, which is very good, which means that as long as we can move forward with its design and manufacturing work as planned, success is just around the corner.

Now when it comes to the development of the fourth-generation Da Zhan, it should be one or two years earlier than the fourth generation of heavy battles, as long as it can go on according to the schedule, it is even very likely that the third prototype of the heavy war will be installed with supporting engines.

Therefore, Yang Huiyan can have a reason not to be excited: "This is thanks to the concerted efforts of all the design and trial production personnel of the 624 Institute, so that the current progress of the core machine can be achieved." However, we have only taken a small step, and there is still a long way to go in the future, and even the development of the core machine will take at least 2 years or so, am I right? ”

It is only a few months before the ignition test of the core machine, Yang Hui believes that this core machine can be finalized after 2 years, and the time is already very tight, if there are some small problems in the middle, it is very likely that it will take 3 years.

For these time nodes, Liu Daxiang, as the current chief engineer of the 624 Institute, of course, knows it clearly, and after nodding in agreement, he will continue to lead the way in front.

While walking, he still lost no time in making some introductions: "Listen to this voice, there should still be testing work over there, specifically it should be to test the maximum air flow of the core machine, although the final data has not yet come out, but I remember that the air flow rate of 68kg has been reached in the last test." ”

To say that this air flow, the fourth-generation big push will definitely not be smaller than the third-generation big push, but the fourth-generation heavy battle for the supersonic cruise index, must require a small bypass ratio design, which leads to the same air flow of the whole machine, the air flow of the core machine of the fourth generation of big push will definitely be 75kg, and it is even possible to go up.

Along the way, before he reached the place where the sound came from, Yang Hui first saw the staff wearing the Northeast system of AVIC hurriedly preparing something, but looking at their faces with happy smiles, there must be something good.

Although he was quite curious, Yang Hui definitely didn't point a finger: "For these people from AVIC Northeast, they should have been here for some time, but the core machine of the Taihang engine over there should be no problem, right?" ”

To say that the core machine of this Taihang engine, the 624 Institute is also quite dedicated to helping to develop, it is said that the final performance is quite good, if you want, work this core machine, it may not be possible to sprint to the maximum military push of 15 tons.

"That's right, this is the staff of AVIC in the northeast, at the beginning of this year, we completed the development of the core aircraft of Taihang, and the people they are now staying here are all representatives who are stationed here, and the manufacturing of the high-altitude platform in the northeast seems to have some financial problems, I am afraid that their Taihang whole machine test work will be carried out in our institute in the future."

can hear such a powerful news, Yang Hui doesn't know what to say, probably can only mourn his misfortune and be angry!

"I see, but now we don't have anything to say, let's continue to talk about our core machine, this is the most important thing at the moment."

…………

When a core machine with a quarter section was placed in front of Yang Hui, it turned out that the design of the core machine did take a lot of thought, especially when it was compared intuitively with the Taihang core machine on the side, it was even more obvious that the advantages of the design were even more obvious.

First of all, Yang Hui obviously saw that the combustion chamber of the fourth generation core stage was shortened, which must be a very obvious progress, and the resulting reduction in engine volume and weight was also a considerable benefit.

In addition, the core machine of the fourth generation of Datui only adopts the design of a 6-stage high-pressure compressor, which is also much shorter than the nine-stage high-pressure compressor design machine of the Taihang core machine.

"Tsk, this is really a powerful core machine, the 6-stage axial compressor design, which is directly shorter than the core machine of Taihang, is at least a quarter shorter, which is a great progress!"

It can be directly on the basic indicators of the core machine of the third generation of big push, and cut off a quarter of the size and length as soon as it comes, which is like putting a big satellite, which seems quite unreal, but the reality is really there.

And whenever he talks about the size of the core machine, Academician Liu Daxiang, who is the chief engineer of the 624 Institute, still wants to say the same joy for the first time, which is really not because he doesn't want to control himself, but because he can't control the excitement at all.

"The reason why we were able to come up with the design of the 6-stage high-pressure compressor is because there is a current international most advanced technology as a backing. With the introduction of large and small blades, we were able to ensure that the design of the 6-stage high-pressure compressor still met the requirements. ”

The size of the blade is a technology that Yang Hui has determined a long time ago, although he only wanted to use it in the turboshaft engine at the earliest, but he didn't expect the technology to mature so quickly, and it was directly used on the fourth generation of the big push, which is really gratifying.

"I know this technology, it seems that this size of blades can not only be used on the core machine, but also in the design of the engine fan.

An excellent technology is so awesome, of course, when GM breaks through the tunable stator technology, it is also a large-scale breakthrough in the performance of GM's aero engine, and now the large and small blade technology is also comparable to the tunable stator technology in importance.

At this moment, another voice came from the side, and it sounded familiar, as if it had been heard a few times......

"Yes! It is precisely because of this technology that we can ensure that the fourth-generation big push may technically reach the level of the American F119 engine, if the life of the engine is not as long as the United States, even 17 tons can be guaranteed to be done. (To be continued.) )